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Related Concept Videos

Mitral Valve Prolapse II: Assessment and Management01:22

Mitral Valve Prolapse II: Assessment and Management

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IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular...
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Cardiomyopathy II: Dilated Cardiomyopathy01:30

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Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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Esophageal Varices-II: Clinical Features and Management

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Esophageal varices often manifest as gastrointestinal bleeding episodes, presenting symptoms like hematemesis (vomiting of blood), hematochezia (passing fresh blood via the rectum), and melena (black, tarry stools). Other signs can include weight loss, anorexia, abdominal discomfort, jaundice, pruritus, altered mental status, and muscle cramps.
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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

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Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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Cardiomyopathy VI: Nursing Management01:29

Cardiomyopathy VI: Nursing Management

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Assessment: Nursing management of patients with cardiomyopathy begins with a thorough assessment of the patient's history, including a family history of cardiomyopathy or sudden cardiac death, personal history of heart disease, hypertension, diabetes, and any alcohol consumption or drug use.During the physical examination, assess vital signs, look for signs of heart failure (such as edema, jugular venous distention, and cyanosis), auscultate for abnormal heart sounds (like murmurs and gallops),...
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Secondary Lymphoid Organs01:15

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Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection.
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
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Surgical Treatment of an Endolymphatic Sac Tumor
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Recurrent Syncope in a Case with Mediastinal Lymphoma.

Miwa Nagano1, Ikuo Misumi1, Koji Sato1

  • 1Department of Cardiology, Kumamoto City Hospital.

International Heart Journal
|May 15, 2022
PubMed
Summary

A large B-cell lymphoma in the mediastinum caused sudden unconsciousness and bradycardia in an elderly man. Autonomic system evaluation may explain such episodes of unknown origin.

Keywords:
Heart rate variabilityIrritation of vagus nerveTransient bradycardia

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Area of Science:

  • Cardiology
  • Oncology
  • Neurology

Background:

  • Sudden loss of consciousness and hypotension can have various underlying causes.
  • Mediastinal masses can present with diverse clinical manifestations.

Observation:

  • An 83-year-old male experienced sudden syncope and hypotension.
  • Imaging revealed a left upper mediastinal mass compressing the left common carotid artery.
  • Histopathology confirmed the mass as a large B-cell lymphoma.

Findings:

  • Electrocardiogram (ECG) monitoring showed transient sinus bradycardia and atrioventricular block.
  • Heart rate variability analysis indicated increased high-frequency power, suggesting heightened vagal activity.
  • This vagal overactivity potentially explains the observed bradycardia.

Implications:

  • Large B-cell lymphoma can manifest with cardiovascular symptoms through mediastinal compression.
  • Autonomic nervous system evaluation, particularly heart rate variability, may elucidate mechanisms of unexplained bradycardia and hypotension.
  • This case highlights the importance of considering mediastinal masses in the differential diagnosis of syncope.